Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 31 for “"active system"”.
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A method of active system safety
The concept of Active Safety proposed originally by Prof Schagaev [3][4][5][6] can be applied to provide additional improvement in safety of a system over its operational lifecycle by continuous analysis and assessment of the state of the system in real time of its operation and reacting …
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Methods for comparative assessment of active and passive safety systems with respect to reliability, uncertainty, economy, and flexibility
Passive cooling systems sometimes use natural circulation, and they are not dependent on emergency AC power or offsite power, which can make designs simpler through the reduction of emergency power supplying infrastructure. The passive system approach can lead to substantial simplification of the …
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Feasibility study of a hybrid passive/active noise absorption system
… the development of a compact hybrid Passive/Active noise absorption system that would be effective over a wide frequency range. The Passive/Active system efficiently integrates both passive and active noise control methods. Both theoretical and experimental investigations were carried out in …
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A Protocol to Determine the Performance of South Facing Double Glass Façade System-A Preliminary Study of Active/Passive Double Glass Façade Systems
… the performance of a double glass envelope system. As a proof of concept, the protocol was applied to an experimental study of a south-facing, single story double glazed ventilated wall system. Two modular full-scale double glazed window models with naturally or mechanically assisted …
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Design and Analysis of Switching Circuits for Energy Harvesting in Piezostrutures
… with a general method for the analysis of a semi-active control technique for a fast-shunt switching system. The benefit of the semi-active system is the reduction in power consumption, which is a significant disadvantage of a fully active system compared with a passive system. A semi-active …
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Adapting a human thermoregulation model for predicting the thermal response of older persons
… The Model defines the body as two interrelating systems of the body structure (passive system) and the control system of the central nervous system (active system). The Older person’s passive system of the model was developed by meticulously extracting relevant experimental data from selected …
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Development of an Active Vision System for the Remote Identification of Multiple Targets
This thesis introduces a centralized active vision system for the remote identification of multiple targets in applications where the targets may outnumber the active system resources. Design and implementation details of a modular active vision system are presented, from which a prototype has been …
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DEVELOPMENT OF SPACE-INVARIANT SIGNATURE ALGORITHM (SISA) - AN INNOVATIVE APPROACH FOR PROCESSING THE MEDICAL IMAGES FOR THE DETECTION AND LOCALIZATION OF EARLY ABNORMALITIES IN BIOLOGICAL TISSUES
… of abnormalities at an early stage in active biological tissues such as cancer, potential tumor growth and damaged tissues. In this proposed SISA approach, if the SISA signature pattern is space-invariant it suggests the absence of any abnormality. A space-variant SISA signature pattern …
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Column Footings Strengthened with External Prestressing and External Wrapping Systems
… this problem, five upgraded footing enlargement systems are proposed in this dissertation:</p> <p>• Circular external prestressing system (CEP);</p> <p>• Circular external regular reinforcement system (CERR);</p> <p>• Circular external BFRP wrapping system (CEBW);</p> <p>• Circular external CFRP …
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On the quantification of safety margins
… of failure. A comparison with an alternative active design is considered also. The results show that the active system can have, for this particular application, better reliability than the passive one.
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Seismic retrofitting of deficient Canadian buildings
… the performance of hybrid base isolation systems is then presented. The performance of passive and semi-active hybrid base isolation system is evaluated through the use of a SIMULINK computer model of a typical two-story concrete frame building. A significant reduction in interstory …
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Design and Evaluation of an Active Yaw and Turbulence Generation System to Produce Unsteady Flow in Automotive Wind Tunnels
… a novel unsteady yaw and turbulence generation system (TGS) for automotive wind tunnels that replicates on-road conditions using three combined subsystems. The focus of this thesis is primarily on one of the TGS subsystems, the unsteady yaw generation subsystem, which was made up of an …
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An Invertible Open-Loop Nonlinear Dynamic Temperature Dependent MR Damper Model
… damper is a commonly used component in semi-active suspensions that achieves a high force capacity and better performance than a passive system, without the added expense and power draw of a fully active system, all while maintaining failsafe performance. To fully exploit the capabilities of …
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Collective Phenomena in Active Systems
… investigates collective phenomena in active systems of biological relavance across length scales, ranging from intracellular actin systems to bird flocks. The study has been conducted via theoretical modeling and computer simulations using tools from soft condensed matter physics and …
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Investigating the Relationships Between Disorder, Structure, and Dynamics in Amorphous Systems
… it arises from the microscopic disorder in the system, we study the spectra of a large ensemble of sparse random matrices where disorder is controlled by the distribution of bond weights and network coordination. When there is a finite probability density of infinitesimal bond weights, we find a …
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A technique for implementing complex boundary configurations in industrial plasma modelling and simulation
… within the vicinity of an electromagnetically active system. The technique is based on the spatial conversion of the system into dynamic electromagnetically time-variable elements, then using circuit/Maxwellian approach to obtain and analyze time snapshots of the spatial voltage distribution …
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Thermoplastic active fiber composites for structural actuation
… actuators into a structure can lead to an active structural surface that can adapt by bending or straining to different operational conditions. This can be used to tune desired properties of the active system to their optimal levels. Due to their fast response time, high bandwidth, and the …
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The impact of passive safety systems on desirability of advanced light water reactors
… light water reactor designs with passive safety systems are more desirable than advanced reactor designs with active safety systems from the point of view of uncertainty in the performance of safety systems as well as the economic implications of the passive safety systems. Two advanced …
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The development and evaluation of a novel passive approach to maintaining residuum volume in trans-tibial amputees
… for testing of passive, modified passive, and active systems and, 2) compare the performance of these systems in terms of residuum volume changes, comfort, and gait kinematics and ground reaction forces. For the first aim, an Instrumented Trans-tibial Prosthesis (ITTP) was developed. The socket …
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Economic regulation of electricity distribution utilities under high penetration of distributed energy resources : applying an incentive compatible menu of contracts, reference network model and uncertainty mechanisms
… use and management of electricity distribution systems - including the proliferation of distributed energy resources, smart grid technologies (i.e., advanced power electronics and information and communication technologies) and active system management techniques - present new challenges for the …
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